TY  - JOUR
AU  - V. Ya. Ivriǐ
TI  - Correctness of the Cauchy problem for nonstrictly hyperbolic operators.~III. The energy integral
JO  - Trudy Moskovskogo matematičeskogo obŝestva
PY  - 1977
SP  - 151
EP  - 170
VL  - 34
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MMO_1977_34_a3/
LA  - ru
ID  - MMO_1977_34_a3
ER  -